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Free Online Tools For Developers

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PDF Tools

Merge PDFs, Delete, Rotate, Rearrange Pages

Use this tool to join or merge PDF files into a single PDF document, in addition to deleting, rotating and rearranging pages in the position you want.

Split the PDF file into many parts, either by fixed or custom size, where each range of pages will be converted into an independent PDF file.

Add page numbers to your PDF file. Numbering can start from a number and page, with a specific position, format and font.

Convert each page of your PDF to an image file in JPG format or extract all the images contained in your PDF to individual JPG files.

Image Tools

Image Compressor

Speed up your website by optimizing (compressing) your images for faster loading. The lighter the pages on your site, the faster they will appear to the visitor.

Images Converter

Easily convert any image to other file formats like JPG, PNG and WEBP. You can use this online tool to convert a PNG image to JPG and vice versa, for example.

This tool converts images to Base64. Encode your image to Base64 in a very easy way, just insert an image and press the Convert button.

Picking an emoji has never been easier. The Emoji Picker organizes a cool collection of Emojis by categories in addition to having a search engine for keywords.

Color Tools

This tool has a color and shade scheme that makes it easy to find the desired color and obtain its respective codes in HEX, HEX8, RGB, RGBA, HSL and HSV. Remember that the harmony between colors favors a more interesting and attractive result.

Find out which colors appear most in a given image (JPEG, PNG, SVG, GIF and WEBP). Get the dominant color palette in the image and its hexadecimal codes.

Color Converter

With this tool you can convert color codes in a very easy way. Just insert a certain color, either by its code or name, and the respective codes will be displayed in HEX, HEX8, RGB, HSL and HSV.

Generators

Generate fictitious credit card numbers completely randomly for software testing purposes, besides also being able to validate a specific card number.

Generate fictitious CPF numbers, but valid for software testing purposes. Also use this tool to validate CPF numbers according to its algorithm.

Generate fictitious CNPJ numbers, but valid for software testing purposes. Also use this tool to validate CNPJ numbers according to its algorithm.

QR Codes are a great marketing and communication tool. Be sure to put a Qr Code on your business cards or pamphlets so that your customers can easily access your website, profile page or portfolio.

This tool allows you to generate barcodes very quickly and easily. Download the generated barcode image for label printing. This tool supports several formats.

Converters

This tool helps you to convert data in XML to the equivalent JSON format. This functionality can be used in cases when software does not accept input files in XML format.

Use this tool to change your text to UPPERCASE or lowercase, invert the text, remove accents, automatically put hyphens or underscores, among other features.

Use this tool to convert numbers from one base to another (binary, decimal, octal, hexadecimal...). Get the representations of numbers in different number bases.

Miscellaneous

Perform percentage calculations quite easily. Just find the sentence that represents your problem (e.g., How much is X% Y?), fill in the fields and you're done.

With this free online tool you can easily check if your CSS code contains any syntax errors to be corrected, thus preventing problems in styling your website.

Email Extractor

Extract all email addresses hidden in text content, thus creating a list of contacts from those emails. This tool won't display the same email found more than once.